72 Datsun 240z

Brake booster arrive. Already installed. Car is stopping much better however when stuck in traffic rpms start to oscillate from 800 to 600 rpms. Should i retune my carbs?

This was solved today by retarding time! Thanks

Here in Panama we use 95 fuel. Mechanic advised to use an octane booster. The thing is how much in half full 16 gallon tank? The whole can or half and then fill up the rest of the tank with 95 fuel?

Hi Jon, Mechanic just confirmed he had advanced the timing to get a quick response in first gear with the hot coil. Should i retard it a little bit? If so how much?

Im experiencing a ratting noise when accelerating in 3rd gear on my 72 240z. Is my timing too advance?

Well im going to send it to Power brake exchange. I do have this kind of symptoms om revs going up and down during traffic jams. Any way to check this before shipping it to Washington? Maybe a pressure suck gun?

This guys are very slow responding emails. Need another shop!

Car is running a little bit better now with the MSD Blaster 2 coil maybe its masking the problem only. Still testing the car. I did noticed the mechanic adjusted the carbs as follows: 4 turns down each carb, 7 at idle screw for front carburetor and 10 at idle screw for rear carburetor. The fast idle screw when raised to 2500 rpm gave different measures on front and rear carburetors.

Just email them, filled up the form and send them pictures of my original brake booster. Hope to get a response from them so i can ship it from Panama to the US.

Thanks. I live outside the US. Getting such booster into the US will pay an import tax.isnt there any shop that can sell me one instead of doing the exchange?

Im planning on buying a kit to rebuild the brake booster in my 1972 240z. Any reliable kits and how difficult is the reman process?

This is how the msd blaster 2 got wired to the tach, distributor and ballast. Hope im not missing anything. Tach is working but plug 4 is still getting fouled at idle.

Car is running fine with the msd blaster 2 coil. Tach is working.

Well just to let you know mechanic managed to make the 240z tachometer work with the MSD Blaster 2 coil which i believe is 0.7 ohms and pertronix 1711 ingitor module. I hope it doesnt burn the 1711 ignitor.

Does anyone sell these float syncs for su carbs anymore?

You are right! Mechanic should get this engine running with pertronix ignitor module 1761, 1.5 coil and 1.5 ohm ballast.

Ill try it! See what happens. Right now we have the pertronix 1.5 coil installed with 1.5 ballast

The thing is my mechanic solved the rough idle and misfire after take off from long traffic by installing an msd blaster 2 coil replacing the pertronix 1.5 coil and 1.5 ballast resistor. The problem is the stock tach does not work with the msd coil which i believe is 0.7 ohms. Going back to the pertronix, the tach worls but the car runs bad.

So what do you recommend? Keeping the 1.5 ohms pertronix and 1.5 ballast resistor i the circuit?

The tach is back in commission connected to the petronix ignitor 1.5 ohms with ballast resistor. Its a shame you cannot make the 1972 240z tachometer work with the MSD blaster 2 coil. Car was running fine at idle and no hesitation or misfiring even when coming out of long traffic jams. Been fighting this problem for more than 11 years and thought this could be a solution. I guess the MSD blaster coil has more power and keeps the spark plugs clean. Any recommendation?

Just thinking if he wired it incorrectly could it damage the tachometer?

I would like to clarify that I dont know the specifications of this msd blast 2 coil. I do know it did solve the rough idle and the misfire issue when coming out of a long traffic jam. Its connected to the pertronix 1761 module installed in the stock hitachi distributor. Just wondering if this msd coil compatible with this petronix module in anyway?

My mechanic finally solved the 11 year old problem by resdjusting the carbs with the temperature of the car during traffic jams, 3/4 of the Temp gauge and an MSD blaster coil. Now he is asking me for a diagram or schematic to get the petronix 1.5 coil and 1.5 ballast resistor running and the 1972 240z tachometer working alltogether. Can seem to find it in the web or haynes manual. Do you have any reference for this? Guess the stock tachometer wont work with the MSD blaster 2 coil.

Let me explain this better. My mechanic is trying to fix rough idle issues when my car is at idle during long traffic jams. He removed the Pertronix 1.5 ohm coil and the 1.5 ohm resistor connected to a Pertronix ignitor 1711 module, and installed an MSD Blaster 2 coil. The tachometer in my 1972 240Z is no longer working? Any ideas of how should i wire this so it brings my tach back to life.